Process for the preparation of dyestuffs consisting in treating decacyclene with sulphuric acid



Patented June 3, i924.

nuit n snares.

xenon nzIEwonsKi, or CRACO'W, POLAND.

PROCESS FOR THE Ho Drawing. Original application filed March 3, 1921, Serial No. 449,590. Divided and this application 'filed December 1, 1921.

To all whom may coflZrfl:

Be it known that I, KAROL Dzrnworism. a

citizen of the Polish Republic; and resident cacyclene C H I have found that the ,decacycleneis easily converted into dyestufi's by treating the same with ordinary or fuming sulphuric acid.

The following example will serve as an illustration of the invention, but the invention is not confined to this concrete example.

Example.

10 parts of decacyclene are treated with 60' par-Ls of sulphuric acid," to which 5 grammes of 20% fuming sulphuric acid have been added for 6 to 7' hours in the cold or some shorter time at a higher temperature. The sulphonation takes place accompanied by oxidation and liberation of sulphur diox idc, the product obtained being perfectly soluble in water. My investigations showe Serial No. 519,103.

that the product is most likely a trioxydecacyclene-trisulphonic acid, forming barium and calcium salts difticultly soluble in water, Whereas the sodium salt is easily soluble. The latter is precipitated in the form of a colloidal voluminous mass by the addition of sodium chloride to the acid. forms a very fast and uniform yellow or bronze yellow dyestufi' dyeing wool and silk in an acid bath. As a tree acid it exhibits stronglycolloidal properties; itvis easily soluble in hotwater, on cooling the solutions gelatinize to a homogenous semi-solid mass.

What I claim is 1. A process for the preparation 0t dye- ,stufi's, consisting in treating decacyclene KAROL DZIE'WOl SKI.

Witnesses: Ar/ExANnnR TYs KoNsoN,

ARTHUR Sznuvnnr. 

